[PATCH] D45444: [clang-tidy] WIP: implement new check for const-correctness

[Jonas Toth via Phabricator via cfe-commits]

JonasToth created this revision.
JonasToth added reviewers: alexfh, aaron.ballman, lebedev.ri, hokein.
Herald added subscribers: cfe-commits, kbarton, xazax.hun, mgorny, nemanjai, klimek.

This check aims to determine values and references that could be declared
as const, but are not.

The first version I am aiming at only analyzes local variables.
No fixits are emitted.

This check aims to implement `CPPCG-ES. 25: Declare an object const or constexpr unless you want to modify its value later on <https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#es25-declare-an-object-const-or-constexpr-unless-you-want-to-modify-its-value-later-on>`
and `HICPP-7.1.2 Use const whenever possible <http://www.codingstandard.com/rule/7-1-2-use-const-whenever-possible/>`.

Because const-correctness includes many issues this check will be implemented
in multiple stages.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D45444

Files:
  clang-tidy/cppcoreguidelines/CMakeLists.txt
  clang-tidy/cppcoreguidelines/ConstCheck.cpp
  clang-tidy/cppcoreguidelines/ConstCheck.h
  clang-tidy/cppcoreguidelines/CppCoreGuidelinesTidyModule.cpp
  docs/ReleaseNotes.rst
  docs/clang-tidy/checks/cppcoreguidelines-const.rst
  docs/clang-tidy/checks/list.rst
  test/clang-tidy/cppcoreguidelines-const-primtive-builtin.cpp

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